Martin Luther King Jr. (January 15, 1929 – April 4, 1968) was an American Baptist minister, social activist, and leader in the American Civil Rights Movement. He is best known for his role in advancing civil rights using nonviolent civil disobedience based on his Christian beliefs. King played a key role in the American civil rights movement from the mid-1950s until his assassination in 1968. मार्टिन लूथर किंग जूनियर (15 जनवरी, 1929 - 4 अप्रैल, 1968) एक अमेरिकी बैपटिस्ट मंत्री, सामाजिक कार्यकर्त